Cogging torque-based braking design method

A technology of cogging torque and design method, which is applied in the manufacture of motor generators, motor components, and stator/rotor bodies, etc., can solve the problems of increased volume and weight, increased structural complexity, and decreased reliability. Simple design, low reliability, and easy-to-achieve effects

Active Publication Date: 2018-05-04
XIAN AEROSPACE PROPULSION TESTING TECH RES INST
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AI Technical Summary

Problems solved by technology

However, the use of brakes causes a series of problems such as a decrease in the overall reliability of the mechanism, an increase in structural complexity, and an increase in volume and weight.

Method used

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  • Cogging torque-based braking design method
  • Cogging torque-based braking design method
  • Cogging torque-based braking design method

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Embodiment Construction

[0026] The embodiments of the present invention are described in detail below, and the embodiments are exemplary and intended to explain the present invention, but should not be construed as a limitation of the present invention.

[0027] The purpose of the present invention is to realize the braking effect by reasonably designing the cogging torque, realize the precise design of the cogging torque, and replace the traditional brake with the cogging torque as the static holding torque without affecting the overall performance of the motor. application, simplify the system structure and reduce the weight of the system.

[0028] The cogging torque is the reluctance torque caused by the change of the air-gap magnetic group, which is expressed by the following formula:

[0029]

[0030] where T cog is the cogging torque, Φ m is the magnetic flux, R is the air-gap reluctance, and θ is the rotor angle. It can be seen from the above formula that there are two main measures for ...

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Abstract

The invention provides a cogging torque-based braking design method. The method comprises firstly applying an RMxprt model in Maxwell software to design a magnetic circuit scheme of a motor, and determining groove profile parameters of a motor stator; gradually increasing the motor stator notch width Bs0 in the software model, and observing the performance of the motor when the cogging torque meets the requirements; if the motor performance is reduced, gradually increasing the thickness of magnetic steel in the software model, so that the motor performance also meets the requirements while thecogging torque meets the requirements; finally importing RMxprt model design results into a 2D model in the Maxwell software to perform cogging torque and stator flux density verification, to confirmwhether the cogging torque reaches the requirements and whether the stator flux density is saturated; and if the requirements are not reached, readjusting the notch width and magnetic steel thickness, until the cogging torque and the stator flux density meet the requirements. According to the cogging torque-based braking design method, the defects of low brake reliability, mechanism redundancy, and heavy weight and the like are overcome, the reliability of a whole mechanism is improved while the motor performance is ensured, and the cogging torque-based braking design method is simple and convenient to design and easy to implement.

Description

technical field [0001] The invention relates to the technical field of electric motors, in particular to a static braking scheme based on cogging torque, which is used for braking measures in large reduction ratio mechanisms. Background technique [0002] The brake is located at the end of the actuator and is a mechanical part that stops or decelerates the motion / transmission mechanism in the machine. For a large reduction ratio mechanism, the brake / brake mechanism is an essential part. However, the use of the brake causes a series of problems such as the decrease of the overall reliability of the mechanism, the increase of the structural complexity, and the increase of the volume and weight. [0003] In the cogging permanent magnet motor, when the armature winding is not energized, the torque generated by the magnetic field generated by the permanent magnet and the cogging of the armature core in the circumferential direction is called cogging torque. It is generated from...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K15/03H02K1/14H02K1/17H02K29/03
CPCH02K1/14H02K1/17H02K15/03H02K29/03H02K2213/03
Inventor 郗珂庆尹海韬成俊康惠旋胡博郭炳岐李敏哲胡昊宗西霞张媛
Owner XIAN AEROSPACE PROPULSION TESTING TECH RES INST
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